More bang for your buck - Cheetah Thruster

[nOmnomnOm]

So currently the cheetah thruster costs about 20 mill while an enhanced thruster is less than a mill
The only difference between the two as far as i know is that the cheetah goes a bit longer if you thrust continuously.
This feature isn't exactly really useful since you can refresh the thruster with engine kill while still moving.

I propose we make some more features for the cheetah thruster so that we get more bang for what we pay for it.
The following things can be added to increase it's value:

-Different colors of thruster (to match with engine color)
-A small speed boost. Probably 5 or something just to make the thruster faster than the enhanced.
-Sound effect? Perhaps they could have a cool sound to go with it?

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